Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1990STEP VAN 6.2 J, AUTOMATIC, 3L80-HD/M40REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 24 (SERVICING - M/T)LUBRICATIONSERVICE INTERVALSNOTES
1990 Chevrolet Step Van 6.2 J, Automatic, 3L80-HD/M40
Service Intervals: Notes
1990 Chevrolet Step Van 6.2 J, Automatic, 3L80-HD/M40SECTION Notes
WARNING: This page does not describe the selected car, but rather 19 other vehicles, including the 1991 Oldsmobile Bravada, 1991 GMC Vandura, 1991 GMC Value Van, 1991 GMC Sonoma, and 1991 GMC S15 Jimmy. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
There are 2 light duty truck emission control classifications: Light Duty (up to 8600 lbs. Gross Vehicle Weight) and Heavy Duty (vehicles more than 8600 lbs. GVW).
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.